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-E. s. PALMER. LUMINOUS SIGHT FOR FIREARMS.

v I APPLICATION FILED ]AN- 24, I919- 1,307,063. Patented J 11116 17,1919.

66 commercially known as radiolite a suflicient UNITED STATES PATENTOFFICE. ERIK PALlitlIEB, on NEW HAVEN, coNNEcrIcU'r, AssIeNon '10wINcHEsrEn REPEA'IING ARMS co, or NEW HAVEN, CONNECTICUT, A CORPORATION.

LUMINOUS SIGHT FOR FIREARMS.

Specification of Letters Patent.

Patented J une 17, 1919.

' Application filed January 24, 1919. Serial No. 272,836.

To all whom it may concern:

Be it known that I, ERIK S. PALMER, a citizen of the United States,residing at New Haven, inthe county of New Haven and 5 State ofConnecticut, have invented a new and useful Improvement in LuminousSightsfor Firearms; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the charac-.

10 ters of reference marked thereon, to be a full, clear, and exactdescription of the same, and which said drawings constitute part of thisapplication, and represent, in-- Figure 1 a perspective view of my im-15 proved luminous rear sight.

Fig. 2 a broken view thereof in vertical section on the line 2+2 of Fig.1.

Fig. 3 a perspective view of my improved luminous front sight.

Fig. 4 anenlarged view thereof, in central vertical section on the line4-4 ofFig. 3. My-invention relates to improved luminous sights forfirearms, whereby greater accuracy of aimed fire is secured in poorlight or at night, the object being to produce at a low cost formanufacture, a simple, durable and reliable sight constructed withparticular reference tofacility of adaptation to individual arms.

With these ends in view, my invention consists in front and rear sightsformed with vertical slots or recesses for the reception'of the luminouscomposition and adapted at their upper ends to be filed off, ifrequired, to adapt them to, the individual arms to which they may beapplied. V Forthe illustration of my inventiongI have shown it asapplied to rear and front sights of standard form. The standard rearsight; shown is made in one piece and come prises a relatively longspring base 5 provided under the under face of its forward end with adovetail fastening-rib '6 and formed at its rear end withthe usuallongitudinal slot 8 for the .reception of an elevator which is notshown. Atits extreme rear end -the base 5 has an upstanding sightleaf 9having the. usual centrally located sight-notch 10. On the rear face ofthe leaf 9 and on either side of the sight-notch 10, I forma verticalslot orrecess 11' in each of i which I place a vertical strip 12 of aluminous composition which may be of any desired character, as forinstance, the composition ,ity required.

sight-leaf 14 rises at a right angle to the may have the structure ofthe sights, but by their proamount of which may be introduced into theserecesses to give the maximum luminos- In these recesses the radiolite isprotected from abrasion or disruption, which is highly important. Byvirtue of locating the luminous composition in such vertical slots, I amenabled to initially construct the sight with a sight-leaf high enoughfor the minimum range. Now if on the trial of a given gun, after therear sight has been applied to it, the gun shoots too high, it is aneasy matter for the user to file down the top of the leaf until thesight has been in this way, perhaps by repeated filings, adapted to theindividual gun. The point to be noted is, that the filing down of thefiat upper edge of the leaf 7 shortens the vertical slots 11 withoutchanging their character. The filing down of the flat upper edge of theleaf 7 'afl'ects the proportionate removal of the luminous material 12and the proportionate lowering of the sight notch 10 so that the upperedges of the luminous material, constituting the night-aiming points,and the sight-notch, constituting day-aiming point, are inoved'downwardto the same extent -to adapt the sight to the individual gun. Thisresult proceeds from the fact that the luminous material is located invertical slots of uniform width.

The standard front sight herein shown, consists of atransverselyarranged dovetail- 'rib 13 or fastening-member from whichthe axis thereof, therearedge of this leaf being formed with a verticalslot or recess 15 for the'recept'ion and protection of a strip-like body16 of radiolite or other luminous composition. The leaf 14 is initiallymade high enough to adapt it tohave its upper edge filed down to meetthe shooting requirements .of the particular gunto which it may beapplied. Here again the filing ofi of the top of the leaf in no wisechanges, the jzharacter or operation of the sight but simply adapts 100it to a given gun.

It is obvious that sights other than those of the particular forms shownand described,

my invention applied to them, my invention being 7 characterized notby-10l vision with'vertically arranged slots or recesses for thereception and protection of the luminous material and the adaptation ofthe parts in hich these slots or recesses are 11' to adapt the sightsto 1. A gun-sight formed'with a vertical slotor recess for the receptionand protection of luminous materialand adapted to have its I upper edgefiled away with the'proportionate removal of the luminous material,whereby the night-aiming point is changed by the same amount as theday-aiming point to adapt the sight to the individual gun.

2. A gun-sight having a plurality of vertical slots or recesses for thereception and protection of luminous material and adapted to have theupper edgeiof the part'containing such slots or recesses filed away withthe proportionate removal of the luminous material', whereby thenight-aiming point is changed by the same amount as the dayaiming'pointto adapt the sight to the individual gun. p

'3. rear sight for firearms the said sight having a base formed at itsrear end with an upstanding sight-leaf the rear face of which is formedwith two vertical slots located on opposite sides of the sight-notch,for the res to be file ception and protection ofv luminous material, theu per edge of the leaf being adapted away with the pro rtionate removalof the luminous materiafi whereby the night-aiming point is changed bythe same amount as the day-aiming point to adapt the sight to theindividual gun.

. 4. A front sight for firearms, consisting of a transverse fasteningmember and an up standing leaf located at a right angle thereto andhaving its rear edge formed with a vertical slot or recess for thereception and protection of luminous,material and having its upper edgeadapted to be filed away with the proportionate'removal of the luminousmaterial, whereby the night-aiming point is aiming point to adapt thesight to the 'individua gun. 4

In testimony whereof, I have signed this specification in the presenceof two subscribchanged by the same amount as the day-

